"The World Factbook provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities."
This report provides estimates on the resident nonimmigrant population by category of admission, country of citizenship, state of destination, age and gender.
As of May 2012, Background Notes are no longer being updated or produced. They are in the process of being replaced by Fact Sheets that focus on U.S. relations with each country. The link to each document from anywhere on http://www.state.gov/ or on any other site, as a bookmark, etc., will remain the same, whether it appears as a Background Note or when it is replaced by a Fact Sheet